The United States has sent additional military personnel to boost security of the US embassy in the South Sudanese capital of Juba amid ongoing unrest in the country, US President Barack Obama said on Wednesday in a letter to the US House Speaker Paul Ryan.

“The first of these additional personnel, approximately 47 individuals, arrived in South Sudan on July 12, 2016, supported by military aircraft,” Obama stated.

The US president noted that some 130 troops stationed in Djibouti are also ready to provide support as necessary.